Piston.



PATENTED MAY 19, 1908.

J. E. THOMPSON.

PISTON.

APPLICATION FILED NOV. 26, 1907.

WITNESSES ATTORNEYS JOSEPH E. THOMPSON, OF GHATTANOOGA, TENNESSEE.

PISTON.

Specification of Letters Patent.

Patented May 19, 1908.

Application filed November 26, 1907. Serial No. 403,874.

T 0 all whom it may concern:

Be it known that I, Josnrn E. THOMPSON, a citizen of the United States,and a resident of Chattanooga, in the county of Hamilton and State ofTennessee, have invented a new and Improved Piston, of which thefollowing is a full, clear, and exact description.

This invention relates to pistons, and it is particularly useful inconnection with reci rocating engines having piston-actuated valveorreversing rods.

An object of the invention is to provide a simply constructed anddurable piston-head which can be firmly secured to a piston-rod, andwhich is formed to actuate a valve-rod.

A further object of the invention is to provide a device of the classdescribed,in which the parts are firmly secured together againstaccidental displacement, which is formed to actuate a valve-rod, and inwhich the latter is prevented from becoming accidentally disengaged fromthe piston.

The invention consists in the construction and combination of parts tobe more fully described hereinafter and particularly set forth in theclaims.

Reference is to be had to the accompanying drawings forming a part ofthis specifica tion, in which similar characters of reference indicatecorresponding parts in both figures, and in which Figure 1 is alongitudinal section of the piston, and Fig. 2 is an end view of thesame.

Before proceeding to a more detailed explanation of my invention, itshould be noted that the same is particularly applicable to certaintypes of reciprocating engines, in which the valve-rod slides within alongitudinal bore of the piston-rod and is actuated by the piston-rodand the piston-head. In engines of this type, it is necessary toconstruct the pistons so that, when necessary, the valve-rods can bedis-engaged therefrom. My invention permits this to be effected and atthe same time prevents the accidental dis-engagement of the valve-rodfrom the piston. Furthermore, the construction of my device is such thatthe piston-head is rigidly secured upon the piston-rod and is firmlyheld against accidental dislodgment therefrom. My invention, however,can also be applied to pistons having solid piston-rods; that is, rodswithout longitudinal bores.

Referring more particularly to the drawings, I employ a piston-head 1,which may be of any preferred or common form, with the exception ofcertain structural details which will appear hereinafter. They include asubstantially central, threaded opening 2, through the piston head,having at the opposite faces of the same laterally extended recesses 3and 4 respectively. The recesses 3 and 4 are preferably concentric withthe threaded opening 2.

I employ a piston rod 5 having its extremity 6 threaded. Adjacent to thethreaded extremity 6, the piston rod has a laterally projecting integralflange 7, formed to fit in the recess 4 when the threaded extremity 6 islocated in the correspondingly threaded opening 2 through the pistonhead. The piston rod has a longitudinal bore 8, adapted to receive avalve rod 9, which has at one end a head or button 10.

A member 11, is formed to fit in the recess 3 of the piston head, and issecured in position by means of rivets 12. The latter are arranged insuitable registering openings of the member 11, the piston head 1 andthe piston rod flange 7. The rivet heads 13 are countersunk in theflange, as is shown most clearly in Fig. 1. The member 11 has a key holeslot 14 thcrethrough, the extended portion 15 of which is formed topermit the head 10 of the valve rod to pass through the same. In thisway the valve rod can be inserted through the member 11 into thelongitudinal bore of the piston rod. The head together with the pistonrod, is cut away to permit the entrance of the valve rod. The narrowerportion of the key-hole slot 14 permits the valve rod 9 to pass freelytherethrough, but )rcvents the head 10 of the latter from being forcedthrough the same. Thus the member 11, when it engages the head 10 of thevalve rod, serves to actuate the latter.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. In combination, a piston head having an opening, apiston rod having an end mounted in said opening, a member arranged atthe side of said head remote from said rod, said rod having an extensionat the side of said head remote from said member, and means for rigidlysecuring said member, said head and said rod extension together.

2. In combination, a piston head having a threaded opening, a piston rodhaving a correspondingly threaded end mounted in said opening, said rodhaving a flange, a member arranged at the side of said head remote fromsaid rod, and means for rigidly securing said member,- said. head andsaid flange together.

, 3. In combination, a piston head having a threaded openingtherethrough, a piston rod having a correspondingly threaded end mountedin said opening, said rod being provided with an integral flangeadjacent to said threaded end, a member arranged at the side of saidhead, remote from said rod, and means for rigidly securing said member,said head and said flange together, said rod having a longitudinal boreadapted to receive a valve rod, said member having an opening adapted topermit the passage therethrough of the valve rod.

4. In combination, a piston head having an opening, a piston rod havingan end mounted in said opening, said opening being extended to formrecesses at the opposite faces of said head, said rod having a flange,arranged in one of said recesses, a member arranged in the other of saidrecesses, said head, said flange and said member having registeringopenings, and securing means arranged in said registering openings.

5. In combination, a piston head having a threaded opening, a piston rodhaving a correspondingly threaded end mounted in said opening, a memberarranged at the side prevent the passage therethrough of said valve rodhead.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JOSEPH E. THOMPSON.

Witnesses:

CLAUDE NroHoLsoN, O. P. STEWART.

